JPS5810908B2 - Fugoujiyouhousakuseihouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for creating code information in voice information for performing necessary control or identification.

Currently, coded information for performing desired control, identification, etc. via electrical means is generally transmitted through a different route from analog signals representing normal information such as sound and light.

This has the advantage that one transmission system is sufficient when code information is inserted into an analog signal and both are transmitted simultaneously over the same route, but at the same time it is inconvenient to have to distinguish between the code information and the analog signal. In addition, since the code information is present in the analog signal, there is a drawback that it hinders the recognition of the analog signal.

Conventionally, code information for necessary control or identification has been created in analog signals, and when transmitting them simultaneously using the same transmission system, automatic broadcasting technology has been used, for example, to automatically check broadcasting facts in television broadcasting. There is a confirmation system.

Confirmation of broadcasting fact is a method for checking (monitoring) on the receiving side whether or not a particular broadcast content, such as a commercial broadcast, was actually broadcast at a predetermined time. In addition to distinguishing only the broadcast information that corresponds to the broadcast information, by automatically recording the encoded information corresponding to the broadcast information, and analyzing the recorded data after the fact, it is possible to determine whether or not the above-mentioned broadcast has occurred, and the time of the broadcast. If you are trying to find out the defects, etc., but you want to do it automatically without doing it manually, it is necessary to identify the specific broadcast information to be checked as described above so that it can be distinguished from other broadcast information. Information (a signal that can be encoded) must be transmitted to the receiver and detected during the actual broadcast of the broadcast information to be verified.

Conventionally, for example, in television broadcasting, there are two ways to confirm the broadcast fact: code information for identification is created on the video side, and code information is created on the audio side.

In the former case, the situation is as follows.

Two colors with different brightness, for example white and black, are painted over a predetermined length on the side edges of the frames of the projection film that record specific broadcast information (the so-called overscan area, which is not normally visible on the screen of a television receiver). The information is intentionally recorded in a predetermined order and used as information for identification, which is then imaged and transmitted together with the actual broadcast information to be broadcast, received by the same receiver, and recorded in the received electrical signal. Therefore, only the information to be identified is discriminated, and predetermined monitor recording related to pattern recognition of the broadcast information is performed using the discriminated information.

However, in the former method, information to be identified is recorded on the side edges of the frames of the projection film (in order not to impair the visual recognition of the image to be actually broadcast, this must be done). (limited to the side edges of the pieces), if the imaging position of the imaging device shifts during the imaging stage, the information will not be captured at all, and the information will not be recorded at such side edges. It is extremely difficult to accurately detect information consisting of a combination of colors due to brightness differences in received signals of all patterns.

The latter method is performed by creating identification information on the audio side, by recording a special pattern of signals, such as a signal of a specific frequency, at a predetermined position on the audio signal recording track as information for identification. By detecting it from the received audio signal, a predetermined record related to pattern recognition of the broadcast content is performed, similar to the former method, but this method does not detect the information for identifying the above-mentioned information. Since it is a possible audio signal, humans hear it as noise, and even though the information pattern is special, it is extremely difficult to detect it more accurately among all patterns of audio signals. be.

In this way, conventionally, code information is created within the main information representing images or audio (original information to be broadcast in the case of broadcasting), but the main information is not included in the main information. This was done by separately inserting a special pattern of signals,
As mentioned above, there are disadvantages in that it is difficult to detect the code information, which hinders the recognition of the main information, and the creation of the code information is cumbersome.

Therefore, the present invention aims to provide a method for creating code information that can be easily created in the main information, has very little interference with the main information, and can be easily detected afterwards. , by transforming the main information (audio information) itself (by intentionally creating silent parts)
It is characterized in that the deformed pattern is used as the code information.

Further, the present invention enables accurate subsequent detection by checking whether the code information is actually created in the main information in a predetermined relationship.

EMBODIMENT OF THE INVENTION Below, the present invention will be described in detail with reference to the drawings regarding an embodiment applied to an automatic broadcast fact confirmation system.

As is well known, the projection film CF has a motion picture signal recording track 1 along the running direction (indicated by an arrow), an audio signal recording track 2 on one side thereof, and a perforation 3 on the other side. It is provided with band-shaped transparent parts 4 perforated at intervals.

This projection film CF optically records images to be broadcast, for example alphabetical characters "A" to "z", in frames 5° to 5r1 divided into sections on the video signal recording track 1, and also records audio. On the signal recording track 2, a series of audio information to be broadcast related to the broadcast images is also optically recorded.

Figure 2 shows a part of this series of audio information expressed as a voltage waveform (analog signal). Within a certain range Th of this waveform, there are three parts where audio information would normally exist, as shown by the dotted lines. , informationless portions Nl, N2, N3, which have no audio information at all, ie, are silent (zero level) for a certain time width ΔL, are artificially formed.

Such non-information parts N1 to N3 are such that when the audio information is in the form of information that can be heard by a human through a speaker,
Although this is a silent section, by making the time Δt short, it will not be recognized as silence, and the audio information can be recognized as normal, including almost original audio information.

This is due to the characteristics of human hearing itself and the rigidity of the speaker's mechanical response operation.

The non-information portions N1 to N3 are intentionally formed by the method of the present invention, and are detected on the receiving side, that is, from the received audio signal (electrical signal) of the television receiver, as will be explained in detail later. Therefore, in order to be able to accurately detect it on the receiving side, the following considerations were taken when creating it.

(1) Set the time interval between the first N1 and the second N2 to a predetermined time Ta, e.g. 50 m5, for a certain time width Δt, for example, 2 ms, and set the time interval between the first N1 and the second N2 as a predetermined time Ta, for example, 50 m5, and the second N2 and the third N3.
Which time interval is set as a predetermined time Tb longer than the above Ta, for example, 150 m5, and a certain pattern is determined in terms of time and sequence.

(2) This is done in the portions where the envelope levels +e and -e of the audio information exceed constant levels +V1 and -Vl for a predetermined period of time Th.

This is due to the following reason.

Even if the non-information portions N1 to N3 are at a completely zero level at the stage of creation, they may change due to some factor at the sending/receiving stage and may no longer be at a completely zero level when they become a received audio signal (electrical signal). There is sex.

Therefore, when detecting on the receiving side, the standard of detection must be an allowable range +v2 to -v2 with a little margin above the zero level.

However, when such a tolerance range is set, level fluctuations on the receiving side may cause the level to fall within the tolerance range when it is actually outside the tolerance range, or conversely, something within the range may fall within the range. There is a risk that it will come out.

Therefore, each non-information portion N1 to N3 is set to the envelope level +
If e and -e are created within the above allowable range +V2 to -V2, the receiving side will detect it as a non-information part, original silence, or a low level. This makes it impossible to determine whether it is a part or not.

Therefore, the creation positions of the non-information portions N, ~N3 are set in advance at +V, where the envelope levels +e, -e are higher than the above tolerance range.
If the value exceeds 1 to -V1, the above-mentioned concerns at the detection stage can be eliminated in advance.

(3) The analog waveform f of the audio information is created at a point where a silent or low-pitched portion falling within the above-mentioned allowable range +v2 to -v2 does not continue for more than the above-mentioned predetermined time Δ.

This is due to the following reason.

According to the requirement of (2) above, each non-information part N, ~N3 is
The envelope level +e, -e of the audio information is at a certain level +
Even if Δ is formed to have a time width when V1, -V1 or more, some of the audio information may be instantaneously +
It can be said that amplitude information within v2 to -v2 is also included, so the envelope levels +e, -e are the above levels +■1, -V
Even if it shows l, in the actual analog waveform f,
There may well be a portion where the level is within the above tolerance range +22 to -v2 and continues for more than the time Δ above.

Therefore, if a non-information part is created in such a part, as is clear from the above, when the receiving side detects it, it will be processed as a non-information part that exceeds the specified time Δt, making it impossible to detect it. .

(4) The leading edge of the no-information portion coincides with the zero level point of the analog waveform f of the audio information.

This is due to the following reasons.

The non-information part is received by electrically transmitting the audio information, and it is natural that it shows a zero level at the electrical signal stage on the receiving side, but the influence of the frequency characteristics or damping characteristics of the transmitter/receiver is considered. Therefore, it is quite conceivable that the above-mentioned received electrical signal is deformed at the stage.

Although the degree of this deformation differs depending on the frequency component of the audio information, if the point in time when the analog waveform f of the information reaches zero level is the start point of creating the no-information part, then the degree of the deformation can be calculated as follows: It can be made as small as possible.

(5) If there is a signal pattern in the audio information itself that has a relationship that is the same or similar to the prescribed non-information parts N1 to N3 to be detected, change that pattern in advance to prevent false detection. It is.

That is, the specified non-information portions N1 to N to be detected
3 has a time width of Δt as mentioned above, and N1 and N
2. What is the time difference between Ta and N2 and N3? What is the time difference between Tb?
l, M2゜M3, both of which have a time width of Δt, or a bass part whose time width falls within the above tolerance range of +v2 to -V2, the time difference between Ml and V2 is equal to the above Ta, V
It is assumed that there is a relationship in which the time difference between V2 and V3 is the above Tb.

If there is a part with such a relationship, it will be treated as a created non-information part to be detected during detection on the receiving side, so for example, the above (1) between V2 and V3.
For example, two non-information parts nl and n2 having a time span of Δt above are created in advance in the part that satisfies the requirements of ~(4), and the relationship Ml, V2°V3 is established as Ml, V2,
The combination is changed to nl, n2, and V3 in order to prevent false detection in advance.

(6) Check in advance whether the non-information portions N1 to N3 have actually been created with the specified relationship, that is, a relationship with a time width of Δt and a time difference of Ta and Tb.

In this way, special consideration has to be taken when creating the non-information parts N1 to N3, but this is because the audio information is transferred from the magnetic recording state of a magnetic tape, which is an example of an audio information recording medium, to the projection film CF. This is carried out at the stage before optical recording conversion to the audio signal recording track 2, that is, at the stage of magnetic recording on the magnetic tape, and the method of the present invention performs this, and the block diagram of FIG. This device is shown in the following, and this device will be explained below.

In this block diagram, the above (1) to (3)
The (a) system performs the function, the (b) system performs the function (4), the (e) system performs the function (5), and the (6) system performs the function is the system (d).

The magnetic tape MT has non-information portions N1 to N3 as described above.
The audio information in its original form, which is not created by the user, is magnetically recorded in advance.

The tape MT runs in the same manner as in a conventionally known tape recorder, and the tape MT runs in the direction of the arrow.

From the rear side in the running direction of the tape MT toward the front, there are a first playback head Ha1, a second playback head Ha2, an erasure head H8, a recording head Hb, and a third playback head Ha3.
are set up opposite each other.

The second reproducing head Ha2 is connected to the input side of the switching means S, which is normally closed, and the recording head Hb is connected to the output side of the switching means S.

Therefore, the audio information once read out by the head Ha2 is normally sent to the head Hb via the switching means S, and is magnetically recorded again on the magnetic tape MT in the same state as previously recorded. When the means S is opened, the signal transmission to the head Hb is cut off, and during the cutoff, re-recording of the corresponding portion is prohibited.

That is, if we look at the re-recorded state of the magnetic tape MT, a no-information portion (silent portion) will be formed.

In this way, the non-information portion is created on the magnetic tape MT by opening the switching means S, but the opening and closing of the switching means S is determined by the correlation of the actions of the systems (a) to (e) above. First, (a)
We will explain the system of

This system (a) is the first reproducing head Ha.

The audio information read out (this envelope level +e, -
e is shown in Figure 4 (4-1)), the above (2) and (3
) and find the part that satisfies the requirements of (1) above.
It has the function of creating the non-information part of the pattern explained in .

This system (a) includes a bandpass filter 10 connected in series from the head Ha01, an analog
Digital converter 11, first digital window comparator 12, positive and negative part determination circuit 13, positive part duration determination circuit 14, gate 15, delay circuit 16, timing pulse generator 17, first synchronization circuit 18, OR circuit 19. This is achieved by a series of connection configurations of the drive circuit 20.

Thus, the band filter 10 passes the audio signal (electrical signal) in the desired frequency band sent from the head Ha1.

The high cutoff frequency of this filter 10 is determined according to the maximum handling frequency of the converter 11 connected to it.

The reason for using the bandpass filter 10 here will be explained later.

The analog-to-digital converter 11 is a conventionally known converter that converts the audio signal, that is, the analog signal that has passed through the filter 10, into a digital signal corresponding to its level, and outputs the digital signal continuously at short time intervals.

The first digital window comparator 12 has a comparison level set to the above-mentioned levels +V1 and -V1, and the analog signal passing through the filter 10 has a +V level.
As shown in Figure 4 (4-2), the signal "H" is output for the part that falls within 1 to -V1, and the signal "L" is output to the part that falls outside +V1 to -V1. It is something to do.

The details of this operation will become clear by comparing the analog waveform in FIG. 6 (6-1) and the first comparator output in FIG. 6 (6-3).

As mentioned above, if the level of the analog signal exceeds +V1, the comparator 12 outputs the signal "L", and as is clear from the above, a no-information section (silent section) may be created. Therefore, this part will be referred to as the "affirmative part" below for convenience of explanation, and +V1 to -■
If it is within 1, a signal "H" is output, indicating that no information part should be created, so that part is called a "negation part".

The affirmative part and negative part determination circuit 13 is connected not only to the comparator 12 but also to a second digital window comparator 22 included in the system C.

This second comparator 22 is the first comparator 12
The comparator level is connected to the converter 11 in parallel to the above tolerance level +V2.
, -V2, and outputs a signal "H" as shown in Fig. 6 (6-2) for the part of the analog signal that has passed through the filter 10 that falls within +■2 to -V2, and A signal "L" is output to the portion outside of +V2 to -V2.

In the case of this judgment standard of +V2 to -V2, the same as above,
The part that outputs "L" will be referred to as the "affirmative part" and the part that outputs "H" will be referred to as the "negative part."

Therefore, the determination circuit 13 uses both comparators 12 and 22.
A short output H representing the negative part of is detected.

In other words, those with short negation parts using +V and ~-V1 as criteria for judgment, and those with short negation parts using +V2~-V2 as criteria are removed, and +V1~
- When there are consecutive positive parts using Vl as the criterion,
Since it is acceptable to create a silent section, "H" is output as shown in (4-3).

When the “H” output in the above [4-3) continues for the time Th that is the generation section of the non-information portions N1 to N3, the affirmative portion duration determination circuit 14 determines that there is no information as shown in [4-4]. It outputs a signal "H" which is a partial creation possible signal.

In this way, the section where no information part can be created is searched, and the details of its operation are explained below using the block diagram of FIG. It will become clear from the explanation.

In this block diagram, a specific configuration of the determination circuit 13 is shown in a portion surrounded by a dotted line.

In this circuit 13, a high level determining section 131 (encircled by a chain line) determines the length of the negation section using the higher level +V1 to -V1 as a determination criterion, and a low level determining section 132 determines the length of the negative section using the higher level +V1 to -V1 as a determination criterion.
Determine the length of the affirmative part using V2~=■2 as the determination criterion.

That is, the determining section 13 is connected to the comparator 12 and determines the "H" output length thereof, and the determining section 132
is connected to the comparator 22 to determine its [L] output length.

First, to explain from the low level determination unit 132, it is the first
and second NOT circuit N0T21°N0T22, first and second gates G21. G22, J-, flip-flop FF2, first and second preset counters PC21
, PC22.

To explain this operation, the above flip-flop F
F2 is the output of the comparator 22, for example, FIG.
The output shown in -1) is input to the J terminal, and the output shown in [7-3] which rises in response to the rise of the output is obtained from the Q output terminal. Determined by [7-5].

That is, the gate G21 always inputs a clock pulse, and also the NOT circuit N0T21 which negates the output of the flip-flop FF2 shown in (7-3) and the signal of (71).
The clock pulse is passed through and supplied to the counter PC21 through the output c7-2) of the NOT circuit N0T21 and the output (7-2) of the flip-flop FF2. The output of 3) is “
H" (see (7-4)).

Further, when the counter PC21 counts a set number of supplied clock pulses, the counter PC21 supplies its output (7-5) to the input terminal of the flip-flop FF2.

In this way, the flip-flop FF2 receives the "H" output from the counter PC21 at its input terminal, but it is not reset at the same time as the input, but is reset when a clock pulse is input after that. Therefore, it is reset with a delay of one clock pulse, and the fourth
It outputs "H" from the output terminal, and the counter PC2
1 is reset at the rising edge of this "H".

At this time, the output (7-5) of the counter PC21 changes from "H" to "L".

Thus, due to the above correlation, the flip-flop FF2 outputs "H" in response to the (H) output of (7-1), and falls after a predetermined time (time set by the counter Pc21); -1) If the interval between adjacent "H" outputs, that is, the period during "L" output is short, the counter PC2
Since the reset signal shown in [1-5] is not supplied from 1 to 1, it continues to be "H" without falling.

As is clear from this, in the read analog signal, the permissible range +V2 to -V
If there is a slight excess part (positive part) exceeding that range in part of the part that falls into 2, that part is removed in the waveform shaping step as described above and merged into the negative part. I end up.

Note that the counter PC21 is the Q of the flip-flop FF2.
Connected to the output terminal and reset by the output from it.

The second gate G22 is connected to the flip-flop FF2 (
The output shown in 7-3) is input as a gate operation signal, and while the "H" output is in progress, the clock pulse is passed through and is supplied to the second preset counter PC22 ((
7-6)).

The counter PC22 rises when it counts the set number of clock pulses that pass through it, and, like the counter PC21, is reset by the rise of the "H" output of the Q output terminal of the flip-flop FF2 and rises at the same time. The signal shown below (7-7) is output.

Thus, the "H" width of the output [7-3] of the flip-flop FF2, and therefore the output [7-1] of the converter 22
If the "H" width is short (less than the set time of the counter PC 22), the counter PC 22 does not react, so it can be said that the short "H" from the output of the comparator 22 has been removed.

In other words, in the analog signal that has been read out, the portion that falls within the allowable range of +V2 to -V2 and has a short time width, that is, the portion that is less than Δt, is removed in the waveform shaping step as described above. .

Thus, in Figure 6, the waveform (6-2) becomes (6-4
) will be outputted from the counter PC22.

Next, the high level determination section 131 will be explained. It consists of a first NOT circuit N0T11, a flip-flop FF1 on J-, a gate G8, a preset counter PC1,
It is composed of a second NOT circuit N0T12.

The output of the comparator 12 shown in FIG. 6 [6-3] (details shown in FIG. 7 (7-8)) is connected to the NOT circuit N0
11 as shown in [7-9), and is input to the J input terminal of flip-flop FF1.

Therefore, flip-flop FF1 is (7-10)
As shown in [7-9], an "H" output that rises in response to the rise of the "H" output is generated from the Q output terminal, and its fall is determined by the output of the counter PC1. .

That is, the gate G1 always inputs the clock pulse, and also receives the output from the Q output terminal of the flip-flop FF1 and the comparator 12 shown in [7-8].
As shown in [7-11], C7-8) "H" inputs the output of C7-8) and passes the above clock pulse.
The period is from the rise of the output to the fall of the output of the flip-flop FF1.

In addition, the counter PC1 rises when the set number of clock pulses passing through is counted as described above (time T1, see Figure 6), and also when the "H" output from the Q output terminal of the flip-flop FF1 rises. It is reset and produces an output shown at C7-12) which falls at the same time.

The flip-flop FF1 receives the output (7-12) from the counter PC1 at its input terminal, and is reset with a delay of one clock pulse like the flip-flop FF2.

As is clear from this, this high level determination section 13
1 removes the short "H" width of the output [7-8] of the comparator 12 by the above operation of the flip-flop FF1, and removes the short "H" width by the above operation of the counter PC1. It can be said that a long one (one with a long negative part based on the high level +V1 to -V1) is extracted.

Thus, in Figure 6, the waveform (6-3) becomes (6-5
) will be output from the counter PC1.

Therefore, the "H" part in (6-4) in the same figure represents the part where no information part should be created based on the lower level +V2 to -V2, and also the "H" part in (6-5) '' can be said to represent a part where no information part should be created based on the higher level +V1 to -V1.

The output of counter PC1 shown in FIG. 7 (7-12) is negated by NOT circuit N0T12 as shown in FIG. Ru.

These negated Ryokawa forces are input to the AND gate AN1 which is constantly supplied with the clock pulse.

Therefore, the clock pulse is output from the AND gate AN1 when both (6-4) and (6-5) are at "L".

This clock pulse is applied to the affirmative part duration determination circuit 14.
It should be entered as follows.

This determination circuit 14 is composed of a preset counter.

Then, this determination circuit 14 is operated by the counters PC12, P
It is configured to be reset by the OR output obtained by ORing C22 with the OR circuit OR1.

Therefore, the determination circuit 14 turns on when it counts the set number of input clock pulses (Th time), and either of the outputs shown in (6-4) or (6-5) becomes "H". It outputs the signal shown in (6-6), which is reset when this happens.

In other words, this judgment circuit 14 selects the higher level +V,
Negative part (where no information part should be created) with ~-V1 as the criterion and the lower level +V2~-V2
When both of the negative parts with the determination criteria are absent continuously for the Th time, the no-information part creation possible signal becomes (
6-6) It also outputs "H" shown in Figure 4 (41), but if either one is present, it is reset and "L" is output.
” to connect.

The output of the determination circuit 14 is input to the delay circuit 16 through the gate 15 (FIG. 3).

The gate 15 is connected to a manual switch means 29, and the gate is opened and closed in conjunction with the operation of the manual switch means 29.

The switch means 29 is manually operated at the time when the no-information portion is to be created and when it is to be terminated.

The delay circuit 16 is configured with a counter, for example, and as shown in (4-5), the output (4) of the determination circuit 14 is
-4) It outputs a signal that rises in response to the rising edge of signal 4) and falls after a set time (this will be described later).

The timing pulse generator 17 outputs the output of the delay circuit 16 (
4-5), and as shown in (4-6), the first and second are driven at a predetermined time interval of the time Ta, and the second and third are at a time interval of Tb. Output three pulses with time width α.

These pulses are supplied to the drive circuit 20 via the first synchronization circuit 18 and the OR circuit 19.

The time width α of the pulse is changed to the time width Δt by the synchronization circuit 18, as will be described later.

Thus, the drive circuit 20 is connected to the switching means S
The time interval between the first and second times is Ta, and the time interval between the second and third times is Tb, and the time interval Δ is opened three times in total.

As a result, a portion of the audio information read out by the second playback head Ha2 corresponding to the time when the switching means S is open is refused to be sent to the recording head Hb, and looking at the recording state of the magnetic tape MT, , (4-13), the informationless portions N1 to N3 where no record exists are the Ta, T
It was created with the relationship between b and Δt.

The delay circuit 16 is used for the following reason, and its set time (delay time) depends on the distance between the first reproducing head Ha0 and the second reproducing head Ha2 and the running speed of the magnetic tape MT. It is determined.

That is, as mentioned above, the detection of the location where the information-free portion can be created is performed using the reproduction information of the first reproduction head Ha1, and the reproduction to create the information-free portion is performed by the second reproduction head Ha2.
Since the reproduction is performed by the following, there is a time difference between the reproduction information of both heads.

Therefore, on the magnetic tape MT, the non-information portion is
In order to create a product at the above-mentioned location that has been detected as being allowed to create, it is necessary to calculate the output [4-4] of the determination circuit 14 indicating that it is possible to create it, based on the separation distance and traveling speed.

System (a) is configured as described above and operates as described above, but the feeding of pulses from timing pulse generator 17 to drive circuit 20 is controlled by system (b). Next, the system (b) that performs the function (4) above will be explained.

This system (b) is composed of the second playback head Ha2, a conventionally known zero level detector 30 connected thereto, and two identical synchronization circuits 18 and 28 connected in parallel. ing.

The zero level detector 30 is a conventionally known device that detects the analog signal sent from the playback head Ha2 (see FIG. 9 (12)).
) A pulse is output as shown in (9-3) in response to the zero level.

Specifically, as shown in FIG. 8, the synchronous circuit 18 is constructed of a flip-flop FF3, a gate G3, and a preset counter PC3.

The flip-flop FF3 inputs the pulse shown in (9-1) from the timing pulse generator 17 to the J input terminal, and also inputs the pulse shown by the zero level detector 30 to the set terminal.
An indication pulse is input to [9-3].

The flip-flop FF3 is set when the first pulse from the detector 30 is input while the pulse [9-1] is being input, and the flip-flop FF3 is set when the first pulse from the detector 30 is input.
It is reset by the output shown in (9-6), and outputs a pulse having a width of the predetermined time Δt from the Q output terminal as shown in (9-4).

This pulse width Δt is determined by the following relationship.

That is, the gate G3 always inputs the clock pulse and also receives the above output (9-4) of the flip-flop FF3.
) is input as a gate operation signal, passes through the clock pulse during its "H" output, and supplies it to counter PC3 (C9-5), and counter PC3 receives the set number (
When the above clock pulses are counted (Δ is time), the pulse (
9-6) and send it to the above flip-flop FF3.
and reset it.

Thus, the "H" output of flip-flop FF3 is Δt
It has a time width of , and its rising edge is an analog signal [9-2
], and its output is sent to the drive circuit 2 through the OR circuit 19 (FIG. 3).
Sent to 0.

Therefore, the three non-information portions N1 to N3 having a time difference of Ta and Tb and a time width of Δt are created starting from the point where the analog signal is at zero level.

Next, a silent part M1 that has the same pattern relationship as the non-information parts N1 to N3 to perform the function (5), that is, to create the silent part M1. The system (e), which detects M2°M3 and changes its pattern, will be explained.

This system (e) is connected in parallel with the bandpass filter 10.7j-log-digital converter 11, which is also included in the system (a), and the digital wind comparator 12, and has a comparator level. the digital window comparator 22 with the voltage set to the lower one of +■2 to -V2, and a positive and negative autopsy detection circuit 23 connected in series to the comparator 22,
Pattern determination circuit 24, gate 25, delay circuit 26, pulse generator 27, the synchronization circuit 28 also included in the system (b), and the OR circuit 19 also included in the system (a)
, and a drive circuit 20.

The above-mentioned positive and negative autopsy detection circuit 23 and pattern judgment circuit 24 will be explained in detail later, but first an overview of their functions will be explained. The output of the comparator 22 (Fig. 4 (4-7)
) ), and when the negative part is longer than a predetermined length that is slightly shorter than Δt, the signal shown in (4-8) is output, and when it exceeds a predetermined length that is slightly longer than Δt (4-8). -9) is output, and when the affirmative part continues for the set length, a signal shown as (4-10) is output.

The pattern determination circuit 24 inputs the three signals (4-8) to (4-10) from the detection circuit 23, and determines the relationship between them by determining the relationship Ta, Tb of the non-information portions N1 to N3.
, Δt, a predetermined coincidence signal is output (this output is not shown in FIG. 4).

This output is sent to a delay circuit 26 through a gate 25 which is opened and closed by the manual switch means 29.

The delay circuit 26 is composed of a counter, for example, and
1], a signal is output which rises upon arrival of the match signal from the determination circuit 24 and falls after a set time.

The pulse generation circuit 27 receives the output of the delay circuit 26 (4-1
1) When driven at the falling edge, as shown in (4-12),
For example, two pulses having the predetermined time width α are outputted at a predetermined time interval.

These pulses are synchronized with the pulses from the zero level detector 30 by the synchronization circuit 28 as in the case of the above-mentioned system (a), and are sent to the drive circuit 20 through the OR circuit 19 as pulses having the time width Δt. do.

Thus, as shown in C4-13), for silent parts M1 to M3 with a similar pattern to the non-information parts N1 to N3 to be created, M2 and M3 are The non-information portion n1. has a time width of the positive portion Δt between n1. n2 will be created.

The specific configurations of the positive and negative detection circuit 23 and pattern determination circuit 24 will be explained with reference to the block diagram shown in FIG.

This block diagram is divided into a positive side detection section 13o, a negative side detection section 13n, and a pattern determination circuit 24 of the detection circuit 23 as surrounded by dotted lines.

First, the negative side detection unit 13n includes a NOT circuit N0Tn, a first gate Gn1, a first preset counter PC, a flip-flop old FFn in J-, a second gate Gn2, a second preset counter PCn2, a third
, a preset counter PCn3, a first setting circuit 5ETn1, and a second setting circuit 5ETn2.

Note that the reset operation of the flip-flop FFn and the counter PCn1 is performed by the above-mentioned flip-flop FF2 (fifth
) and the reset operation of the counter PC21.

The first gate Gn1 is constantly supplied with a clock pulse, and also receives the output of a NOT circuit N0Tn that negates the output of the comparator 22 (FIG. 11 (11-2)) as a gate operation signal.

Therefore, the clock pulse passes through the gate Gn1 when the signal [1l-2) is at "L".

The preset counter PCnl outputs a pulse when it counts a set number of clock pulses that have passed through the gate Gn1, and supplies it to the flip-flop FFn as a reset signal.

The Noritsu flop FFn inputs the output (11-2) of the comparator 22 to its J input terminal, and outputs a signal that rises in response to the rise of the "H" portion and falls in response to the output of the counter PCn1 to its Q output terminal. Output from

Therefore, this flip-flop FFn has the same function as the flip-flop FF2 shown in FIG.
"H" is output as a whole, except for "(time less than the set time of counter PCn1)".

The gate Gn2 uses the "H" output of the flip-flop FFn as a gate operation signal and passes the clock pulse.

Both second and third preset counters PCn2゜PCn3
are both connected to the gate Gn2 so as to count the clock pulses passing through the gate Gn2, and their reset is performed by the output from the Q output terminal of the flip-flop FFn.

The second counter PCn2 has its set time set to a time that is slightly shorter than the above-mentioned Δ, and the third counter
The counter PCn3 is set so that Δ is slightly longer than the time.

Therefore, as shown in (11-3), the counter PCn2 detects that the audio information (analog signal) read out by the first playback head Ha1 is as shown in [1l-1), and the negative part thereof is as shown in [1l-1]. When the time is longer than a predetermined time that is slightly shorter than Δt, “H” is output, and as shown in (11-4), the third preset counter PCn3 outputs Δt.
When the time is longer than a slightly longer predetermined time, "H" is output.

Next, the positive side detection unit 13o detects the knot circuit N0To, J
- flip-flop FFo, first gate G;

1, first preset counter PCo1, second gate G.

2. Second preset counter PGo2, third preset counter PCo3, first setting circuit 5ET
o1, first gate group GO3 (only one is shown for convenience),
a second setting circuit 5ETo2, a second gate group G;

4 (only one is shown for convenience).

Note that the reset operation of the flip-flop 70 block FFo and the counter PCo1 is performed by the above-mentioned flip-flop FF2 (fifth
) and the reset operation of the counter PC21.

Kate G.

1 inputs "H" of the comparator output (11-2) as a gate operation signal and passes the above clock pulse.

The first preset counter PCo1 outputs a pulse when it counts a set number of clock pulses passing through, and supplies it to the flip-flop FFo as a reset signal.

The flip-flop FFo has a comparator output (11-
The output of the NOT circuit N0To that negates 2) is input to its J input terminal, and as shown in (11-5), [11-2
] rises in response to the fall of the output of counter PCo1.
It outputs a signal that falls in response to the reset pulse of [11-1], thereby removing the short negative part of the analog signal [11-1].

2nd game)G.

2 inputs the output (11-5) of the flip-flop FFo as a gate operation signal and passes the clock pulse.

Both second and third preset counters PCo2゜Pco2
Both are Gate G.

Count the clock pulses passing through 2.

Both counters PCO2 and PCO3 have a gate G connected to the second preset counter PCn2 included in the negative side detection section 13n.

3. It is connected via Go4, and the output from it (11-
3) controls the counting time.

Further, both counters PCO2 and PCO3 receive the fall of the output from the output terminal of the flip-flop FFo as a reset signal.

Furthermore, they are set by the setting circuit 5ETo1゜5ET.
The counting time of the second counter PCo2 is determined by o2, and the first counting time is determined to be a time slightly shorter than the time Ta, the next time is determined to be a time slightly shorter than the time Tb, the next is determined to be Tc, and the third The counter PCo3 is determined to have a first time slightly longer than Ta, a second time slightly longer than Tb, and a second time slightly longer than Tc.

The above setting circuit 5ETn1, 5ETn2゜5ET
o+, 5ETO2 consists of a combination of gates, and its setting signal, that is, the preset counter PCn2. The settings for PCH3, PCO2 and Pco2 can be changed using encoded signals from the timing change circuit 53 shown in FIG. 3, which is comprised of registers.

The timing change circuit 53 is an OR circuit 52 in the same figure.
is connected to a manually adjustable mechanical encoder 51 through which the system of the encoded signal can be changed indirectly.

Further, the changing circuit 53 is connected to the timing pulse generator 18 included in the system (a), and can change the timing of the pulse.

By manually adjusting the encoder 51, the timing pulse generator 18 and the pattern determination circuit 24 can change the timing of their pulses or the pattern determination criteria.

Next, in FIG. 10, the pattern determination circuit 24 includes a negative shift register SFn, a first OR circuit 0Rp1,
Positive side shift register SFo, second OR circuit 0Rp
2. Consists of an AND circuit ANp.

The shift register SFn inputs the output (11-3) of the second preset counter PCn2 on the negative side, and the shift register SFo inputs the output [11-6] of the second preset counter PCo2 on the positive side. Both shift registers input the output (11-4) of the third preset counter PCn3 and the output (not shown) of the preset counter PCo3 as a reset signal [1l-13] through the OR circuit 0Rp1. It is supposed to be done.

The setting signal of the setting circuits 5ETo1 and 5ETO2 is the output [1] of the preset counter PCn2.
gate group Gg3.l-3). When GO4 is opened, the preset counters PCo2 and Pco2 are respectively input, thereby presetting these counters as described above.

However, the output of preset counter PCn3 [11-4
] passes through the OR circuit 0Rp1 and becomes (11-13), and when the shift register SFo is reset, the output corresponding to (11-13) from this shift register SFo passes through the OR circuit 0Rp2 and becomes (11-13). 5ETo1 and 5ETo2, and these setting circuits disable the counting of the preset counters PCo2 and Pco2, so both of these preset counters are connected to the gate G.

It is now impossible to count the clock pulses passing through 2.

Therefore, the preset counter PCo2 is [1l-1
), if there is a silence or bass part that is longer than Δ, even if C11=3) is "H",
Game)G.

2 (passes when “H” in [11-5]))
do not count incoming clock pulses.

Therefore, "H" is not output in [11-6].

However, if the silent or bass part has a time width of Δ (Ml), the short "H" in (11-3)
” and gate group G.

3 is opened and preset by the setting circuit 5ETo1, the clock pulse rises when the clock pulse is counted for the preset value (a value slightly shorter than Ta) as shown in [1l-6), and the Q output of the flip-flop FFo. It outputs a signal "H" which is reset by the rising edge of and falls.

Subsequently, this counter PCo2 is preset to a time slightly shorter than Tb with a short "H" of (116) corresponding to the next silence or bass part M2, and when clock pulses are counted for that time, the same as above is performed. to "
Then, it is preset to Tc with a short "H" of (11-6) corresponding to N3.

The third preset counter PCo3 operates in the same way as the second preset counter PCo2, except that its preset time is different.

Therefore, in the read analog electrical signal, the silent or bass portion M1. M2. When the time width of M3 is Δt, the time interval between Ml and N2 is Ta, and that between N2 and N3 is Tb, the shift register SFn outputs "H" of (11-3), which is the output of counter PCn2. At the falling edge of ``, it shifts to [11-7], then (11-8) (except when it is reset at (11-13)), outputs as [1l-9), and the other Shift register SFo is the output of counter PCo2 [1l-
At the rising edge of "H" in 6), it shifts to [11-10], then (11-11), and outputs as (11-12), and these shift registers SFn and SF
The output of o is input to an AND circuit AN.

Thus, Ml, N2. When N3 has the above relationship, the output shown in [11-14] is obtained from the AND circuit ANp, and this causes the delay circuit 2 in FIG.
6 operates as described above, and a no-information portion (silent portion) nl, n2 is created between N2 and N3 to prevent false detection.

In addition, in the above case, for example, if there is silence or a low tone part with a time width of Δt between N2 and N3, the output shown in (11-14) cannot be obtained from the AND circuit AN. It's obvious.

Next, the non-information part N created as described above.
1. N2. The system (d) for checking whether N3 is actually formed on the magnetic tape MT will be explained.

This system (d) is connected to the third playback head Ha3, and its configuration is substantially the same as the component from the band pass filter 10 to the pattern determination circuit 24 in the system (c). .

That is, bandpass filters 40 connected in series
, an analog-to-digital converter 41, a digital window comparator 42 with a comparator level in the above-mentioned allowable range +V2 to -V2, and a positive and negative autopsy detection circuit 43.
, a pattern determination circuit 44.

11 (11 The output shown in -14) will be obtained.

A preset counter 50 for pass judgment is connected to the pattern judgment circuit 44, and the output [1
l-14) is converted into a pulse and sent to the counter 50.

Therefore, the counter 50 counts the number of pass judgment outputs output by the pattern judgment circuit 44.

This counter 50 is connected to the timing change circuit 53 via the OR circuit 52, and the pattern determination circuit 4
When there is a pass judgment output from 4, it is possible to change the pulses generated by the timing pulse generator 17 and the judgment criteria of the pattern judgment circuits 24 and 44 in system (a).

Therefore, the magnetic tape MT has Ta, T as mentioned above.
b, three non-information parts N1 with a pattern of Δt
After ~N2, it is possible to create a non-information part with a different pattern and even a different number.

In this way, the magnetic recording contents of the magnetic tape MT having the non-information portion created by the method of the present invention are transferred to the projection film CF.
(FIG. 1), it is clear that the above-mentioned non-information portions N1 to N3 can be formed on the audio signal recording track 2.

Next, at the time of actual broadcasting of the information recorded on the projection film CF that has formed the non-information portions N1 to N3 in this way, confirmation is made as to whether or not the broadcast information has actually been broadcast. A device for detecting the non-information portions N1 to N3 from the received signal of a television receiver will be described with reference to FIG. 12.

Detection of non-information parts N1 to N3 is performed using the system (
d), therefore, it is obvious that it is possible by using the same configuration as the component from the band pass filter 10 to the pattern determination circuit 24 in system (c), and the configuration of the device shown in FIG. It is almost the same as d).

That is, it is one of the components of the television receiver TV, such as a bandpass filter 100 connected to an audio detector (not shown), which has an amplitude of more than the lower level +V2~-■2. It has a large gain characteristic with respect to the signal shown, and thereby the non-information portions N1 to N3
amplitude compensation circuit 110, analog-to-digital converter 101, and the lower level +V2~
- a digital window comparator 102 with V2 as a comparison level, a positive and negative autopsy detection circuit 103,
The pattern determination circuit 104 is configured by a pattern determination circuit 104.

Therefore, in this device, an output is obtained from the pattern determination circuit 104 when information to be broadcast recorded on the projection film CF is received by the television receiver TV.

The reason for using the bandpass filter 100 is that the non-information portions N1 to N3 created as zero level may be deformed during the transmission and reception stage and become a vibration waveform with a low amplitude. This is to remove it.

In this way, since the bandpass filter 100 is used to detect the non-information portions N1 to N3 on the receiving side, the system shown in FIG. 3 also uses the systems (a), (c) and ( In b), the bandpass filters 10 and 40 were used.

As described above, the non-information parts N1 to N3 are detected as code information in a certain permutation and combination on the receiving side,
It is actually possible to confirm the fact of broadcasting based on the fact of its detection alone, but in order to automatically confirm a large number of broadcast information to be confirmed using one device, pattern recognition of each broadcast information is required. To do this, a large number of non-information parts as described above may be arranged and combined in a predetermined permutation and combination so that they can be obtained as code information at the detection stage.

In addition, three non-information parts N1 to N3 as described above are created at the beginning and the last part of the recording of the broadcast information to be confirmed, and a predetermined gate is opened upon detection of the first non-information part, and the last part is opened when the first non-information part is detected. The gate is closed upon detection of the non-information portion, and while the gate is open, the received audio electrical signal (analog signal representing audio information) of the television receiver TV is allowed to pass through, and the audio signal that has passed through is allowed to pass through. It is also conceivable to perform integration for each required number of frequency components and perform pattern recognition of the broadcast information using the integration system.

In addition, in the above, for determining the level of the analog signal,
It was digitally processed using an analog-digital converter 11゜41.101 and digital window comparators 12.42, 102, which uses an analog wind comparator and shapes its output into a rectangular wave signal using a waveform shaping circuit. Even if this is done, the same processing as above can be performed.

Furthermore, in the above, the code information created according to the present invention is used to confirm the broadcast fact in wireless television broadcasting, but it may also be in the case of radio broadcasting or cable broadcasting, and it includes a series of audio information. The present invention can be applied to any case where information for controlling, identifying, etc. other than the main information is to be transmitted at the same time as the main information.

For example, in television broadcasting or radio broadcasting, for example, code information (a combination of silent parts) is created in music, and the code information is used as information representing traffic conditions, weather forecasts, communication between broadcasting stations, and broadcasting. If the information represents the switching, this information can be retrieved on the receiving side while listening to the music.

As is clear from the above description, the present invention randomly removes a part of the audio information (main information) over a time span that does not impair the recognition of the audio information, and removes a plurality of silent parts.
It is created in the main information at set time intervals, and the combination of the silent parts is used as the code information.As in the past, by inserting another signal that does not constitute the information into the main information. Unlike creating the main information, the code information is retained in the main information by changing the form of the main information, so the code information does not interfere with the main information, such as noise, as in the past. I have nothing to give.

Furthermore, since the encoded information is created by interrupting the audio information transmission system, it is extremely easy to create and can be retrieved by detecting silent parts in the audio information. Therefore, it is extremely easy to detect, and can also be transmitted by transmitting audio information.

Furthermore, since it is confirmed whether or not the code information is actually created in the audio information according to a predetermined relationship, it can be checked at the stage of detecting the code information after the fact.
It is possible to reliably detect information without confusing it with similar pattern information.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to an automatic broadcast fact confirmation system. Fig. 1 is a plan view showing the information recording state of the projection film, and Fig. 2 shows the audio signal recorded on the audio signal recording track of the projection film. FIG. 3 is a block diagram of an example of a device directly used to carry out the method of the present invention, and FIG. 4 shows the output of the required circuit in the block diagram of FIG. 3. 5 is a block diagram specifically showing the affirmative and negative portion judgment circuit and the affirmative portion duration judgment circuit in the block diagram of FIG. 3, and FIG.
FIG. 7 is a time chart showing the output of the required circuits in the block diagram shown in FIG. 5. FIG. 9 is a block diagram showing the specific relationship between the zero level detector, the synchronization circuit, and the timing pulse generation circuit in the block diagram of FIG. 8. FIG. 9 is a time chart showing the output of the required circuits in the block diagram of FIG. The figure is a block diagram showing the specific configuration of the positive and negative autopsy detection circuits and pattern judgment circuits included in system (c) in the block diagram of FIG. 3, and FIG. A time chart showing the output of the circuit, and FIG. 12 is a block diagram of a device for detecting the silent portion from a received signal of a television receiver.

Claims (1)

[Claims] 1. By interrupting the electrical transmission system that transmits a series of audio information in the form of analog electrical signals as many times as necessary at short predetermined time intervals, the above-mentioned A process of creating a required plurality of silent parts of a predetermined time width at the above-set time intervals, making the audio information contain code information based on a combination of the required plurality of silent parts, and then producing the audio information on the audio information recording medium. The series of audio information recorded in the above is read out in the form of an analog electrical signal, the level of the analog electrical signal is determined, and a binary signal corresponding to a portion that is at zero level and a portion that is within a predetermined range and a portion that exceeds that range is determined. After obtaining an electrical signal, the waveform of the binary electrical signal is shaped to remove short parts of the high and low image parts, and the time width of the high and low image parts of the shaped binary electric signal is calculated. and the permutation have a predetermined relationship corresponding to the time width and time interval of the required plurality of silent parts, so that the code information is recorded on the audio information recording medium. A method for creating coded information, comprising the step of confirming whether or not it has actually been created in the series of voice information that has been created.